CALATHIDiE. PCECTLIDiE. 29 



Family CALATHIDJE. Calathidans. 



XII. Genus CALATHUS. Bonell. 



(34) 1. Calathus gregarius. (De Jean.) Gregarious Calathus. 



Calathus gregarius. De J. Culiopt. iii, 76, 13. 



Carabus gregarius. Melsh. Cat. 



Feronia gregaria. Say. Amer. Trans. N. S. ii, 47,21. 



Length of the body 4i lines. 



Taken frequently in Lat. 54°. 



DESCRIPTION. 



Body glossy, rufo-piceous underneath, above nigro-piceous. Palpi and antennas pale testaceous : 

 prothorax quadrangular with the angles rounded ; anteriorly emarginate ; channelled ; basilar impres- 

 sions slight ; lateral margin rufous dilated posteriorly : elytra furrowed, furrows impunctured ; four 

 punctiform impressions between the second and third furrows, the three anterior ones adjacent to the 

 latter, and the posterior one to the former : legs pale testaceous. This genus is distinguished from 

 the following one by having its claws pectinated. 



Family PCECILIDiE. Pcecllldans. 



XIII. Genus PLATYDERUS. Steph. 



(35) 1. * Platyderus nitidus. Glossy Platyderus. 



P. fnitidusj ater, nitidus ; antennis piceis : scapo rufo ; pedibus testaceis ; elytris sulcatisfoveolis duabus impresses. 

 Glossy Platyderus, black, glossy ; antennae picebus with a rufous scape ; legs testaceous : elytra deeply furrowed with two 

 punctiform impressions. 



PLATE I, FIG, 5. 



Length of the body 4 lines. 



Three specimens, all females, taken in Lat. 54°. 



DESCRIPTION. 



Body black, glossy. Head triangular ; mouth piceous ; antennas rather longer than the prothorax, 

 piceous with the terminating joints paler, scape rufous : prothorax subquadrangular with the posterior 

 angles rounded, emarginate at the base, as well as at the apex, slightly channelled, with a pair of 

 linear basilar impressions on each side, the external one being oblique and the other longitudinal : 

 elytra rather deeply furrowed with two punctiform impressions, in the usual situation ; viewed in the 

 sun, the elytra exhibit changeable shades of blue and bronze : forebreast piceous : legs clear testa- 

 ceous. 



